feat: add title to sidenav

[Wawrzyn321]

Description

• Show title on hover on SideNav group title and SideNav item. It defaults to name, but it would show [Object object] if name is a component (and not a plain string), so I had to add an optional title prop.
• Make sure texts wrap in SideNav - although the default class specifies text-overflow and overflow, it also sets display: flex, which disables the former... I couldn't add custom SCSS (build fails) nor CSS (*.css files aren't copied), so I went with inline style approach.

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